Little programs or scripts or automations you’ve created ad-hoc to solve a particular single use case
I have lots of shortcuts i make on my phone and I have one i love that detects when bluetooth accidentally or purposefully disconnects from my speaker and reconnects it and fixes a playback glitch so its back to playing properly
One I miss the most is one I had on my Nokia N900. It would take a photo with both cameras, aquire the current GPS position and upload all those things to my server. Then it would check for a file on my server and if it existed would create an SSH tunnel, allowing me to SSH into the phone from my server.
It was supposed to be an anti theft measure. Never needed it. Was still cool that the phone had this possibility.